The most-Googled kitchen question — “can I use soap on cast iron?” — has a nuanced answer that many Montreal cooks get wrong. The short version: modern dish soap is safe in small amounts, but soaking kills cast iron fast, and in Montreal’s hard water environment that rust forms in minutes. Whether you have a vintage Wagner skillet passed down from your grandparents or a shiny new Le Creuset Dutch oven from Maison Birks, the right protocol depends on which type of cast iron you’re working with.
 *Photo: Unsplash*
---
Bare Cast Iron vs Enameled Cast Iron: Know Which One You Have
The single most important thing before cleaning is identifying your pan:
Bare (raw) cast iron — Lodge, Wagner, Griswold, unmarked vintage pieces, and the cast-iron camping gear sold at Canadian Tire and Sail — has a dark matte finish that is essentially porous iron coated with layers of polymerized oil (the “seasoning”). No soap, no soaking. Water and immediate drying are the foundation of maintenance.
Enameled cast iron — Le Creuset, Staub, Tramontina, and the colour-coated Costco Dutch ovens — has a vitrified glass enamel coating fused to the iron at high temperature. This surface is non-porous and requires an entirely different protocol. Soap is fine. No dishwasher. No metal utensils.
Visual test: run your finger along the interior surface. Smooth, coloured (cream, red, blue), or clearly coated = enameled. Dark grey or black matte surface with visible texture = bare cast iron.
---
Bare Cast Iron: Daily Cleaning Protocol
The 3-Step Routine After Every Use
1. Rinse while warm. Let the pan cool off the heat for 5–10 minutes (never plunge a hot cast-iron pan under cold water — thermal shock can crack the iron). Then rinse under hot water.
2. Scrub stuck food. The right tool makes all the difference: - Lodge cast iron scraper ($10–15 Canadian Tire/Home Depot): fits the curved sides and releases stuck food without scratching - Chainmail scrubber ($15–25, available online/Canadian Tire): the best all-purpose tool for baked-on residue; safe on bare cast iron; far more effective than a brush - Coarse salt + paper towel: pour 2–3 tablespoons of coarse kosher salt into the pan, scrub with a folded paper towel; the salt acts as an abrasive that doesn’t damage seasoning; dispose of the salt-and-debris mixture
What NOT to do: no soaking. Montreal tap water is moderately hard at 90–150 mg/L CaCO₃ and contains dissolved minerals that accelerate iron oxidation. A cast iron pan left in water for even 30 minutes will develop orange rust spots. Dry it the moment you’re done rinsing.
3. Dry completely and oil. This is the most skipped step. Dry the pan over medium heat on the stovetop for 2–3 minutes until no steam rises, then immediately apply a thin coat of oil. Rub a few drops of canola oil (Maxi/IGA/Metro ~$4–6/L, high smoke point 240°C) across the interior with a paper towel, then wipe off almost all of it — the coating should be nearly invisible, not greasy. A greasy-feeling layer will become sticky gunk after the next use.
The Soap Myth: What’s Actually True
The “never use soap on cast iron” rule came from the era of lye-based soap (sodium hydroxide), which actually could strip polymerized oil seasoning. Modern dish soap — whether Dawn, Sunlight, or the eco-friendly Seventh Generation brand available at IGA and Maxi — uses palmitate or sulfonate surfactants that are safe on well-seasoned cast iron in small amounts.
The real rules are: - A few drops of dish soap for a quick scrub after a greasy cook: fine - Soaking in soapy water: strips seasoning and causes rust - Long contact with any water: causes rust in Montreal hard water within minutes
For heavily greasy pans (after searing meat or cooking at high heat with butter), 1–2 drops of Dawn in the pan, a quick 30-second scrub with the Lodge scraper, thorough hot-water rinse, and immediate stovetop drying is the correct protocol.
---
Deeper Cleaning for Stubborn Cases
When food has carbonized onto the surface and neither the scraper nor chainmail scrubber removes it:
1. Add 1 cm of water to the pan, place over medium heat, bring to a simmer for 3–5 minutes 2. The steam loosens baked-on debris; scrape with the Lodge scraper while the water is still hot 3. Drain, rinse, dry on stovetop, oil
For general grease accumulation on the exterior of the pan over time: a few drops of dish soap with a soft brush on the outside only is fine and helps remove polymerized grease buildup on the exterior walls and handle.
---
Rust Removal: Montreal-Specific Protocol
Montreal’s climate creates two rust seasons for bare cast iron:
- July–August: humidity 70–80% RH; pans left on the counter without oil are at risk within 48 hours
- October transition: heating season begins, indoor humidity drops rapidly from outdoor 60–70% to Hydro-Québec forced-air 20–25% — but brief condensation episodes on cool pans before the interior stabilizes can trigger surface rust
The good news: visible rust does not mean your pan is ruined.
Surface Rust (Light Orange Spots)
1. Apply a small amount of vegetable oil to a fine steel wool pad (grade 0000 — the finest grade, available at Canadian Tire ~$5 for a pack) 2. Scrub in circular motions until the rust disappears 3. Rinse, dry completely on stovetop, and immediately begin re-seasoning
Widespread or Pitted Rust
1. Mix equal parts white vinegar and water in a container large enough to submerge the pan 2. Soak for maximum 30 minutes — white vinegar (acetic acid) dissolves iron oxide, but extended soaking will damage the iron itself and cause pitting 3. Remove and scrub with coarse steel wool under running water 4. Neutralize: rinse thoroughly, dry completely on stovetop, then begin re-seasoning immediately
Severe rust (pitting, flaking): start with 60-grit sandpaper to remove flaking material, progress to 120-grit to smooth, finish with steel wool for remaining rust, then re-season the pan completely.
White vinegar 4 L is available at IGA, Maxi, Metro, or Dollarama for ~$3–5. Use standard white vinegar, not apple cider or wine vinegar.
---
Re-Seasoning Your Cast Iron Skillet
Re-season when: after any rust removal, after accidental stripping, when food sticks on a previously reliable surface, when the surface looks grey and dull instead of deep black.
Re-seasoning protocol:
1. Wash the pan with dish soap and water — this is one of the few times soap is appropriate, to remove all old residue before building new seasoning 2. Rinse thoroughly, dry on stovetop over medium heat until completely dry (5 minutes) 3. Apply a very thin coat of oil across every surface — interior, exterior, handle 4. Wipe off almost all of it with a clean paper towel. The seasoning that survives should feel almost invisible. If it feels greasy, wipe again 5. Place the pan upside down in the oven at 220°C (425°F). Put a sheet of foil on the rack below to catch any oil drips 6. Bake for 1 hour, then let cool completely in the oven (turn the oven off and leave the door shut) 7. Repeat steps 3–6 two to three more times for full seasoning restoration
Best oils for Quebec households: - Canola oil (Maxi/IGA/Metro/Costco ~$4–6/L): high smoke point 240°C; Canada’s most widely available high-smoke oil; ideal for cast iron seasoning - Flaxseed oil (health food section, IGA/Maxi ~$8–12/500 mL): excellent at polymerizing into a hard durable layer; apply in extremely thin coats; available at the Bulk Barn as well - Crisco shortening (any Quebec grocery store ~$5–8): the traditional Quebec household choice for seasoning cast iron; stable and effective
The sticky-coating error: if your pan feels tacky after seasoning, you used too much oil. Place the pan back in the oven at 220°C for 30 minutes, wipe off the softened sticky layer while still warm, and re-apply a thinner coat. After applying oil, wipe until you think you’ve removed all of it, then wipe once more.
For more on kitchen appliance and cookware care, see our [Montreal cookware cleaning guide](/en/blog/how-to-clean-cookware-montreal) and [kitchen deep-clean guide](/en/blog/how-to-deep-clean-a-kitchen-montreal).
---
Le Creuset and Enameled Cast Iron: Different Rules
Le Creuset is everywhere in Montreal — at Zone Maison in Rosemont and the Plateau, Maison Birks downtown, Kitchen Stuff Plus in Pointe-Claire and Laval, and Canadian Tire’s lifestyle section. It is also passed down through Quebec families as cherished heirloom cookware.
Daily Cleaning for Enameled Cast Iron
- Soap is fine: the enamel surface is non-porous glass; dish soap cannot penetrate or damage it
- Never the dishwasher: repeated thermal cycling in a dishwasher damages the enamel bond over time; hand wash only
- No metal utensils: metal chips enamel; use silicone or wooden spatulas and spoons
- No abrasive pads: no green Scotch-Brite, no steel wool, no Comet or Ajax on enamel
- Cool before washing: same thermal shock rule as bare cast iron — let cool before washing
Removing Interior Brown Staining from Le Creuset
The cream and white interior of Le Creuset pans develops brown staining from searing and high-heat cooking over time. This is normal and does not affect performance.
Bar Keepers Friend (available at Canadian Tire ~$4–6 for the powder) is the correct cleaner for Le Creuset enamel staining: 1. Make a paste with a small amount of water 2. Apply with a soft cloth to the stained interior 3. Rub in circular motions for no more than 2 minutes 4. Rinse thoroughly
Never use Bar Keepers Friend on bare cast iron — it’s an oxalic acid-based product that works on enamel; simple steel wool and oil are the correct approach for bare iron.
Le Creuset Warranty
Le Creuset’s lifetime guarantee covers manufacturing defects in materials and workmanship — not cleaning damage. Chipped enamel from metal utensil strikes, enamel damaged by harsh chemicals, or brown staining are not covered. Clean correctly and the warranty remains meaningful.
---
Storage in Montreal
- Best option: hang with a cast iron hook on a pot rack — no humidity trapped under the pan
- Stacking: place a paper towel, cloth, or pan protector between stacked pans to prevent moisture transfer and surface contact
- Winter storage: Hydro-Québec forced-air heating drops indoor RH to 20–25% in January–February — the lowest-rust-risk period for cast iron storage
- Danger periods: October and April when indoor humidity transitions rapidly; October is particularly risky as pans cooled by lower temperatures can briefly condense humid autumn air
- Never: damp basements or garages from March to May during snowmelt season; Montreal’s spring moisture is the primary cause of rust on stored cast iron
For a full stovetop cleaning routine that pairs with cast iron use, see our [Montreal stovetop cleaning guide](/en/blog/how-to-clean-a-stovetop-montreal).
---
FAQ — Cast Iron Skillet Cleaning Montreal
Q: Can I use dish soap on cast iron?
A: Yes, with the right approach. Modern dish soap — Dawn, Sunlight, or Seventh Generation — uses palmitate or sulfonate surfactants that are safe on well-seasoned cast iron in small amounts. A few drops for a quick scrub is fine. What damages cast iron is soaking: Montreal’s hard water at 90–150 mg/L CaCO₃ will cause visible orange rust on a soaked cast iron pan within 30 minutes. The real rule is “no soaking, immediate drying.” The lye-based soaps that gave rise to the “never use soap” rule haven’t been household products since the 1950s.
Q: My cast iron has orange rust spots — is it ruined?
A: No. Surface rust on cast iron is almost always recoverable. For light orange spots: scrub with fine steel wool (grade 0000) and a little oil until the rust disappears, then dry completely and season. For more widespread rust: soak in a 50/50 white vinegar and water solution for at most 30 minutes (vinegar dissolves iron oxide but also attacks the iron itself if left too long), then scrub thoroughly, rinse, dry, and re-season. Only cast iron that has corroded all the way through — with holes or severe structural pitting — is unrecoverable.
Q: What is the best oil for seasoning cast iron in Montreal?
A: Canola oil is the most practical choice for Montreal households — widely available at any IGA, Maxi, Metro, or Costco for $4–6/L with a high smoke point of 240°C. Flaxseed oil polymerizes to an exceptionally hard layer but must be applied in extremely thin coats; it’s available in the health food section of most Quebec grocery stores and at Bulk Barn. Crisco shortening is the traditional choice in Quebec households and works very well. Avoid olive oil (low smoke point, goes rancid in the seasoning) and butter (milk solids burn into the seasoning).
Q: How do I clean a Le Creuset pan differently from bare cast iron?
A: Le Creuset’s enameled cast iron uses a vitrified glass coating and follows different rules. You can use dish soap freely — the enamel is non-porous and soap cannot penetrate it. Never put it in the dishwasher (repeated thermal cycling damages the enamel bond over time). Use Bar Keepers Friend paste to remove brown interior staining (2-minute contact maximum, then rinse). Never use steel wool, green Scotch-Brite, or abrasive powders like Comet on enamel. And never use metal utensils — they chip the enamel surface.
Q: Why is my cast iron sticky after seasoning?
A: Too much oil. This is the most common seasoning error. When too much oil is applied, it polymerizes into a gummy, sticky layer rather than a hard, slick surface. Strip the excess by placing the sticky pan in an oven at 220°C for 30 minutes, then wipe off the softened sticky layer with a paper towel while still warm. Apply a new coat of oil so thin it’s nearly invisible, and re-season. The rule: after applying oil, wipe it off until you think you’ve removed all of it, then wipe once more.
Q: How often do I need to re-season a cast iron skillet?
A: Seasoning builds continuously with each use — every cook with oil, every stovetop dry, every careful rinse adds another micro-layer of polymerized coating. You should not need a dedicated re-seasoning oven session unless you’ve removed rust, stripped the pan accidentally, or notice food sticking on a surface that was previously reliable. Cook regularly and follow the daily protocol (dry + oil after every use), and a well-maintained Lodge skillet or vintage Wagner piece will get better and more non-stick with every meal. If you need help keeping your entire kitchen in top condition, our [home cleaning service](/en/services/home-cleaning) and [deep cleaning service](/en/services/deep-cleaning) cover the full kitchen as part of a complete home clean.
